However, the DNA that makes up chromosomes becomes more tightly packed during cell division and is then visible under a microscope. Most of what researchers know about chromosomes was learned by observing chromosomes during cell division.
To obtain experience, you can volunteer or work as a wildlife biologist for a state or federal agency such as the U.S. Fish and Wildlife Service or National Park Service. Another way to meet the experience requirement is to complete either a master's or Ph.D. degree program in wildlife biology or a related subject. A master's degree counts for one year of experience, a Ph.D. counts for two years, and a person who holds both degrees is granted the equivalent of three years of experience.
While some colleges and universities allow you to declare a zoology major at the undergraduate level, you won't be able to find many attractive career opportunities with only a bachelor's degree in the field. In order to become a zoologist, you need to complete graduate studies and work through a doctoral degree. Zoologists are typically trained for several years at a college or university and are involved with a variety of research projects before they can apply for a position in their field.